add support for portal 2 demo files

Author: p2r3

.gitmodules

@@ -4,3 +4,6 @@
 [submodule "src/handlers/qoi-fu"]
 	path = src/handlers/qoi-fu
 	url = https://github.com/pfusik/qoi-fu
+[submodule "src/handlers/sppd"]
+	path = src/handlers/sppd
+	url = https://github.com/p2r3/sppd

package.json

@@ -20,9 +20,13 @@
     "@ffmpeg/util": "^0.12.2",
     "@imagemagick/magick-wasm": "^0.0.37",
     "@types/meyda": "^5.3.0",
+    "@types/three": "^0.182.0",
     "meyda": "^5.6.3",
     "mime": "^4.1.0",
     "pdftoimg-js": "^0.2.5",
+    "three": "^0.182.0",
+    "three-bvh-csg": "^0.0.17",
+    "three-mesh-bvh": "^0.9.8",
     "vite-plugin-static-copy": "^3.1.6",
     "wavefile": "^11.0.0"
   }

src/handlers/index.ts

@@ -9,6 +9,7 @@ import renameHandler from "./rename.ts";
 import envelopeHandler from "./envelope.ts";
 import svgForeignObjectHandler from "./svgForeignObject.ts";
 import qoiFuHandler from "./qoi-fu.ts";
+import sppdHandler from "./sppd.ts";
 
 const handlers: FormatHandler[] = [
   new canvasToBlobHandler(),
@@ -20,5 +21,6 @@ const handlers: FormatHandler[] = [
   new envelopeHandler(),
   new svgForeignObjectHandler(),
   new qoiFuHandler(),
+  new sppdHandler(),
 ];
 export default handlers;